Papers by JUAN GONZALEZ CENTENO
Journal of Food Protection, 2002
The cross-inhibition between 23 Lactococcus lactis subsp. lactis strains and 9 L. lactis subsp. c... more The cross-inhibition between 23 Lactococcus lactis subsp. lactis strains and 9 L. lactis subsp. cremoris strains with different randomly amplified polymorphic DNA patterns, all isolated from the same ecological niche—cheese made in the spring at a single factory from raw milk without added lactic starter cultures—was investigated. Cross-inhibition, as determined by the agar well diffusion assay, was recorded in 130 cases (12.7%) out of 1,024 total cases, with 109 cases due to supernatants of L. lactis subsp. lactis strains and 21 cases due to supernatants of L. lactis subsp. cremoris strains. L. lactis strains isolated in April, May, and June showed differences in their inhibitory activities, with cross-inhibition against each other in 34.7, 14.1, and 6.1% of the cases, respectively. Polymerase chain reaction techniques using specific primers for nisin, lacticin 481, and lactococcin A only revealed the presence of the structural gene of lacticin 481 in two L. lactis subsp. lactis st...
Se establecieron generalidades y caracteristicas sobre Plaguicidas de Uso Domesticos. Preparacion... more Se establecieron generalidades y caracteristicas sobre Plaguicidas de Uso Domesticos. Preparaciones plaguicidas destinadas a la lucha contra las plagas domesticas comunes, por los ocupantes de las viviendas o al tratamiento quimico de articulos domesticos: el papel de las paredes, mosquiteros y cortinas dentro o alrededor de la casa. las importaciones de Plaguicidas de Uso Domestico se han incrementado, segun DRF / DGSVA / MAG. La mayoria pertenecen a la CLASIFICACION IV (Ligeramente Peligroso) recomendada por la OMS basada, en el valor de la Dosis Letal Media (DL 50) oral y dermica en ratas, Se establecieron mecanismos de accion y sintomas en caso de una Intoxicacion con Plaguicidas,con sus tratamientos ha seguir. Se implemento el Metodo ACVP para analizar la Linea de Vida de los Plaguicidas en Estudio, para estudiar las etapas o fases de vida de un plaguicida, disenado para investigar Plaguicidas Agricolas, pero se adapto para el estudio de Plaguicidas Domestico como Productos Formulados. El Metodo ACVP es un sistema matriz que comprende una LINEA VERTICAL y una LINEA HORIZONTAL. LINEA VERTICAL = Representa la “Linea de Vida” de un plaguicida, compuesta por una serie de etapas, que se originan en su produccion y finaliza con las consecuencias de su uso. La Linea de Vida esta dividida en: 1.Produccion (Ingrediente Activo) 2.Ingreso al Pais 3. Formulacion 4.Distribucion 5.Aplicacion en las Viviendas 6.Eliminacion de Desechos. LINEA HORIZONTAL = Representa el instrumento legislativos y reglamentario que se aplica a cada una de las estaciones comprendidas en la Linea Vertical (En El Salvador, no se ha implementado una LEGISLACION ESPECIFICA para regular y vigilar el manejo, distribucion y uso de Plaguicidas de Uso Domestico). La investigacion abarca un aspecto o un tema muy poco conocido como es el caso de las FUMIGADORAS CASERAS, se pueden definir como: Empresas, o personas, que se encargan de controlar y/o liminar infestaciones de vectores o plagas a nivel domestico, dentro o alrededor de la vivienda. En base a la investigacion de Campo se determinaron aspectos poco conocidos de estas “empresas”: La mayoria de empresa establecidas en la Zona de Estudio estan constituidas por una persona y estas “empresas” no estan registradas en DRF, legalmente solo existe una empresa fumigadora en la Cabecera Departamental de Usulutan. Estos no realizan un diagnostico previo a la aplicacion, y en la mayoria de los casos no eliminan completamente a la plaga. En base a los testimonios de las Familias encuestadas en la mayoria de los casos los productos, plaguicidas, que aplican contiene una gran cantidad de Kerosen y a la larga estas aplicaciones no son eficaces.
This monograph is about Infrastructure Geostatistics by using geographic information systems, whi... more This monograph is about Infrastructure Geostatistics by using geographic information systems, which is to make a geostatistical analysis of the relationship between the existing urban infrastructure and the surrounding environment conditions. We chose to take the city of Cuenca, being an urban land with the highest density of population and above all that is in continuous development, where we can find the urban infrastructure such as education, health, recreational, industrial, commercial, etc. ., we want to analyze statistically with respect to the environment. Maps would be produced for appropriate applications as a better site selection, better natural resource management, urban planning, traffic engineering and facilities management especially. Furthermore, the connection / intersection define layers combining result. The purpose of this monograph is to produce geostatistical maps that doesnt exist at the moment, and can serve as support tools for planning future settlements and appropriate location of urban infrastructure for the development of the above employ the use of GIS software for the production of these planes.
Comunicacion Estudios Venezolanos De Comunicacion, 2007
En este texto, el autor revisa el estado de la opinion publica venezolana concebida como comunida... more En este texto, el autor revisa el estado de la opinion publica venezolana concebida como comunidad de habla, en el contexto de la polarizacion politica, enfocando en las discusiones relacionadas a la aplicacion de la Ley de Responsabilidad Social en Radio y Television.
Medunab, Oct 6, 2010
Resumen Los ensayos clinicos (EC) constituyen la base para la creacion de recomendaciones terapeu... more Resumen Los ensayos clinicos (EC) constituyen la base para la creacion de recomendaciones terapeuticas basadas en evidencia. Por lo tanto, es deseable que la comunidad academica local aumente su preparacion y abilidades en el analisis critico de EC para juzgar su validez, valorar el tamano de sus resultados y determinar la aplicabilidad a su propia practica. Este articulo (la primera de dos partes) presenta los fundamentos conceptuales y las caracteristicas mas importantes de los EC, a la vez que presenta algunos terminos de uso corriente en los informes de este tipo de estudios. Palabras clave: Ensayos clinicos, metodologia, aleatorizacion.
Reflexion Politica, 2007
Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto
García Rodríguez, M., Centeno, J.D. (2009). Paisajes graníticos y disponibilidad de agua en zonas... more García Rodríguez, M., Centeno, J.D. (2009). Paisajes graníticos y disponibilidad de agua en zonas de regolito. Un modelo para la gestión del agua subterránea. Actas IV Convención Internacional de la Universidad de Matanzas (Cuba). II Taller Internacional AGROREC. ISBN. 978-959-16-1080-5. 15 pág.
http://ggyma.geo.ucm.es/GeoloGuias/Memorias/zarzalejo_M_0001.pdf
Geophysical Research Abstracts Vol. 14, EGU2012-6279-1, 2012 EGU General Assembly 2012 © Author(s... more Geophysical Research Abstracts Vol. 14, EGU2012-6279-1, 2012 EGU General Assembly 2012 © Author(s) 2012 Weathering landforms exposure and erosion phases in Pedriza de Manzanares (Spanish Central Range) M. García-Rodríguez (1), J.D. Centeno Carrillo (2), and M. Alvarez de Buergo (3) (1) Departamento de Ciencias Analíticas. Universidad de Educación a Distancia (UNED), Madrid, Spain. [email protected], (2) Departamento de Geodinámica. Universidad Complutense de Madrid (UCM), Madrid, Spain. [email protected], (3) Instituto de Geociencias (CSIC-UCM), Madrid, Spain, [email protected] The phases of erosion can be reconstructed measuring the position and dimensions of exposed granite underground weathering landforms. We afford a first approach of this kind of “erosion history” in the area of Pedriza de Manzanares. Pedriza de Manzanares is the main part of the Natural Park of High Manzanares River Basin. The area is part also of the Late Paleozoic granites of the Spanish Central Ra...
Journal of dairy science, 2010
Two batches of smoked, semi-hard (ripened for 45 d) San Simón da Costa cow's milk cheeses wit... more Two batches of smoked, semi-hard (ripened for 45 d) San Simón da Costa cow's milk cheeses with Protected Designation of Origin were used to investigate the chemical, biochemical, and sensorial parameters that may be affected by modified-atmosphere packaging. Cheeses were packaged for 45 d as follows: vacuum packaging, packaging in 100% N(2), packaging in a gas mixture of 20% CO(2)/80% N(2), and packaging in a gas mixture of 50% CO(2)/50% N(2). The San Simón da Costa cheeses were characterized by high contents of lactic, oxalic, and citric organic acids. The main free amino acids found were isoleucine, phenylalanine, serine, valine, lysine, and glutamic acid, and the most abundant volatile compounds included ethanol, diacetyl, 2-butanol, isopropyl alcohol, furfural, acetaldehyde, 2-butanone, acetone, and 2-methylfuran. Modified atmospheres appeared to alter the ripening processes by affecting lipolysis, as indicated by the lower concentrations of butyric and propionic acids compa...
A t the expected time, the orbiter, flying at about 300 km in altitude and around 3.5 km.s -1 , f... more A t the expected time, the orbiter, flying at about 300 km in altitude and around 3.5 km.s -1 , focused toward the surface of the arid, cold and reddish planet and opened the shutter of the complex and precise camera. A new image from the Mar-tian surface, and gigabytes of data, were then recorded at the same time. These process has been repeated many times in recent decades by the differ-ent orbiters, landers and rovers that we have sent to our nearest planet. Every new image and data set increas-es the incredibly huge database of information on Mars. Scientists from all around the world use these resources to study the planet's chemi-cal, physical, climatic and geological environment, with the aim of under-standing more about Mars and how it – and even Earth – has evolved. This widespread availability of images and data is one of the most amazing phenomena in the history of science – never before have so many experts shared so much information and pro-duced so many models and ...
Therapeutic advances in cardiovascular disease, 2013
The extent to which treatment with amlodipine/losartan may help patients and their doctors from A... more The extent to which treatment with amlodipine/losartan may help patients and their doctors from Andean countries to reach their treatment goals remains unknown. We conducted a quasi-experimental, validation study in which patients with primary, uncomplicated hypertension received open-label, fixed combination therapy with amlodipine/losartan 5/50 mg or 5/100 mg according to their baseline blood pressure (BP). The primary outcome was echocardiographic reduction of left ventricular mass (LMV) after 6 months of treatment. Secondary outcomes were changes in BP, uricemia and albuminuria from baseline. We defined patients with adequately controlled hypertension as those with decreases in at least three out of these four variables. From 109 eligible patients with hypertension, 99 started the protocol (70 under the low-dose combination). Echocardiography indices had mutual correlation and contributed independently to the primary outcome (Cronbach's α index = 0.66). Intention-to-treat an...
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Papers by JUAN GONZALEZ CENTENO